MFJ-962D Instruction Manual
5
below 40 watts and 10 watts between 40 and 200 watts. In the
2000W
(
HI
) position the forward power
scale must be multiplied by 10. Each picket represents 50 watts below 400 watts and 100 watts from
400 to 2000 watts.
The reflected power is read on the right-hand REFLECTED meter scale. This scale indicates 50 watts
full scale when the
200W
power sensitivity is selected, and 500 watts full scale when the
2000W
power
scale is selected. This scale has a picket every watt below 20 watts and every 5 watts above 20 watts.
This scale is also multiplied by 10 when using the
2000W
power position.
The most accurate power readings occur in the upper half of the meter scales. When trying to measure
power with a less than perfect match, the reflected power should be
subtracted
from the forward power
readings.
The SWR is read directly from eleven red SWR curves that range from 1:1 to infinity. SWR is
measured by observing the point where the forward and reflected power needles cross. The SWR is
indicated by the red curve closest to the needle crossing point. No cumbersome or time consuming
SWR sensitivity adjustments are required with this meter.
The wattmeter has an internal lamp that backlights the meter scale. The lamp circuit requires power
from an external 12 Vdc source, such as the optional MFJ-1312B power supply. The rear panel jack
accepts a 2.1 mm coaxial plug with the center conductor positive (+) and the sleeve negative (-). The
negative lead is grounded inside the tuner. The
METER LAMP ON / OFF
switch turns the meter lamp
on and off.
Antenna Selector
The
ANTENNA SELECTOR
allows you to select 2 rear panel SO-239 coaxial connectors, either direct
or through the tuner, a coax bypass output, and balanced feedline antennas.
